// 云对象教程: https://uniapp.dcloud.net.cn/uniCloud/cloud-obj
// jsdoc语法提示教程：https://ask.dcloud.net.cn/docs/#//ask.dcloud.net.cn/article/129
const createConfig = require('uni-config-center')
const buildTemplateData = require('./build-template-data')
const {
	parserDynamicField,
	checkIsStaticTemplate
} = require('./utils')
const schemaNameAdapter = require('./schema-name-adapter')

const uniSmsCo = uniCloud.importObject('uni-sms-co')
const db = uniCloud.database()
const smsConfig = createConfig({
	pluginId: 'uni-sms-co'
}).config()

function errCode(code) {
	return 'uni-sms-co-' + code
}

const tableNames = {
	template: 'opendb-sms-template',
	task: 'opendb-sms-task',
	log: 'opendb-sms-log'
}

module.exports = {
	_before: async function() { // 通用预处理器
		if (!smsConfig.smsKey || smsConfig.smsKey.length <= 20 || !smsConfig.smsSecret || smsConfig.smsSecret
			.length <= 20) {
			throw new Error('请先配置smsKey和smsSecret')
		}

		this.tableNames = tableNames

		/**
		 * 优化 schema 的命名规范，需要兼容 uni-admin@2.1.6 以下版本
		 * 如果是在uni-admin@2.1.6版本以上创建的项目可以将其注释
		 * */
		await schemaNameAdapter.call(this)
	},
	_after: function(error, result) {
		if (error) {
			if (error instanceof Error) {
				return {
					errCode: 'error',
					errMsg: error.message
				}
			}

			if (error.errCode) {
				return error
			}

			throw error
		}

		return result
	},
	/**
	 * 创建短信任务
	 * @param {Object} to
	 * @param {Boolean} to.all=false 全部用户发送
	 * @param {String} to.type=user to.all=true时用来区分发送类型
	 * @param {Array} to.receiver 用户ID's / 用户标签ID's
	 * @param {String} templateId 短信模板ID
	 * @param {Array} templateData 短信模板数据
	 * @param {String} options.taskName 任务名称
	 */
	async createSmsTask(to, templateId, templateData, options = {}) {
		if (!templateId) {
			return {
				errCode: errCode('template-id-required'),
				errMsg: '缺少templateId'
			}
		}

		if (!to.all && (!to.receiver || to.receiver.length <= 0)) {
			return {
				errCode: errCode('send-users-is-null'),
				errMsg: '请选择要发送的用户'
			}
		}

		const clientInfo = this.getClientInfo()

		const {
			data: templates
		} = await db.collection(this.tableNames.template).where({
			_id: templateId
		}).get()
		if (templates.length <= 0) {
			return {
				errCode: errCode('template-not-found'),
				errMsg: '短信模板不存在'
			}
		}
		const [template] = templates

		// 创建短信任务
		const task = await db.collection(this.tableNames.task).add({
			app_id: clientInfo.appId,
			name: options.taskName,
			template_id: templateId,
			template_contnet: template.content,
			vars: templateData,
			to,
			send_qty: 0,
			success_qty: 0,
			fail_qty: 0,
			create_date: Date.now()
		})

		uniSmsCo.createUserSmsMessage(task.id)

		return new Promise(resolve => setTimeout(() => resolve({
			errCode: 0,
			errMsg: '任务创建成功',
			taskId: task.id
		}), 300))
	},
	async createUserSmsMessage(taskId, execData = {}) {
		const parallel = 100
		let beforeId
		const {
			data: tasks
		} = await db.collection(this.tableNames.task).where({
			_id: taskId
		}).get()

		if (tasks.length <= 0) {
			return {
				errCode: errCode('task-id-not-found'),
				errMsg: '任务ID不存在'
			}
		}

		const [task] = tasks
		const query = {
			mobile: db.command.exists(true)
		}

		// 指定用户发送
		if (!task.to.all && task.to.type === 'user') {
			let index = 0
			if (execData.beforeId) {
				const i = task.to.receiver.findIndex(id => id === execData.beforeId)
				index = i !== -1 ? i + 1 : 0
			}

			const receiver = task.to.receiver.slice(index, index + parallel)
			query._id = db.command.in(receiver)
			beforeId = receiver[receiver.length - 1]
		}

		// 指定用户标签
		if (task.to.type === 'userTags') {
			query.tags = db.command.in(task.to.receiver)
		}

		// 全部用户
		if (task.to.all && execData.beforeId) {
			query._id = db.command.gt(execData.beforeId)
		}

		// 动态数据仅支持uni-id-users表字段
		const dynamicField = parserDynamicField(task.vars)
		const userFields = dynamicField['uni-id-users'] ? dynamicField['uni-id-users'].reduce((res, field) => {
			res[field] = true
			return res
		}, {}) : {}
		const {
			data: users
		} = await db.collection('uni-id-users')
			.where(query)
			.field({
				mobile: true,
				...userFields
			})
			.limit(parallel)
			.orderBy('_id', 'asc')
			.get()

		if (users.length <= 0) {
			// 更新要发送的短信数量
			const count = await db.collection(this.tableNames.log).where({
				task_id: taskId
			}).count()
			await db.collection(this.tableNames.task).where({
				_id: taskId
			}).update({
				send_qty: count.total
			})

			// 开始发送
			uniSmsCo.sendSms(taskId)

			return new Promise(resolve => setTimeout(() => resolve({
				errCode: 0,
				errMsg: '创建完成'
			}), 500))
		}

		if (!beforeId) {
			beforeId = users[users.length - 1]._id
		}

		let docs = []
		for (const user of users) {
			const varData = await buildTemplateData(task.vars, user)
			docs.push({
				uid: user._id,
				task_id: taskId,
				mobile: user.mobile,
				var_data: varData,
				status: 0,
				create_date: Date.now()
			})
		}

		await db.collection(this.tableNames.log).add(docs)

		uniSmsCo.createUserSmsMessage(taskId, {
			beforeId
		})

		return new Promise(resolve => setTimeout(() => resolve(), 500))
	},
	async sendSms(taskId) {
		const {
			data: tasks
		} = await db.collection(this.tableNames.task).where({
			_id: taskId
		}).get()
		if (tasks.length <= 0) {
			console.warn(`task [${taskId}] not found`)
			return
		}

		const [task] = tasks
		const isStaticTemplate = !task.vars.length

		let sendData = {
			appId: task.app_id,
			smsKey: smsConfig.smsKey,
			smsSecret: smsConfig.smsSecret,
			templateId: task.template_id,
			data: {}
		}

		const {
			data: records
		} = await db.collection(this.tableNames.log)
			.where({
				task_id: taskId,
				status: 0
			})
			.limit(isStaticTemplate ? 50 : 1)
			.field({
				mobile: true,
				var_data: true
			})
			.get()

		if (records.length <= 0) {
			return {
				errCode: 0,
				errMsg: '发送完成'
			}
		}

		if (isStaticTemplate) {
			sendData.phoneList = records.reduce((res, user) => {
				res.push(user.mobile)
				return res
			}, [])
		} else {
			const [record] = records
			sendData.phone = record.mobile
			sendData.data = record.var_data
		}

		try {
			//   await sendSms(sendData)
			await uniCloud.sendSms(sendData)
			// 修改发送状态为已发送
			await db.collection(this.tableNames.log).where({
				_id: db.command.in(records.map(record => record._id))
			}).update({
				status: 1,
				send_date: Date.now()
			})
			// 更新任务的短信成功数
			await db.collection(this.tableNames.task).where({
					_id: taskId
				})
				.update({
					success_qty: db.command.inc(records.length)
				})
		} catch (e) {
			console.error('[sendSms Fail]', e)
			// 修改发送状态为发送失败
			await db.collection(this.tableNames.log).where({
				_id: db.command.in(records.map(record => record._id))
			}).update({
				status: 2,
				reason: e.errMsg || '未知原因',
				send_date: Date.now()
			})
			// 更新任务的短信失败数
			await db.collection(this.tableNames.task).where({
					_id: taskId
				})
				.update({
					fail_qty: db.command.inc(records.length)
				})
		}

		uniSmsCo.sendSms(taskId)

		return new Promise(resolve => setTimeout(() => resolve(), 500))
	},
	async template() {
		const {
			data: templates = []
		} = await db.collection(this.tableNames.template).get()
		return templates
	},
	async task(id) {
		const {
			data: tasks
		} = await db.collection(this.tableNames.task).where({
			_id: id
		}).get()
		if (tasks.length <= 0) {
			return null
		}

		return tasks[0]
	},
	async updateTemplates(templates) {
		if (templates.length <= 0) {
			return {
				errCode: errCode('template-is-null'),
				errMsg: '缺少模板信息'
			}
		}

		let group = []
		for (const template of templates) {
			group.push(
				db.collection(this.tableNames.template).doc(String(template.templateId)).set({
					name: template.templateName,
					content: template.templateContent,
					type: template.templateType,
					sign: template.templateSign
				})
			)
		}

		await Promise.all(group)

		return {
			errCode: 0,
			errMsg: '更新成功'
		}
	},
	async preview(to, templateId, templateData) {
		const count = 1
		let query = {
			mobile: db.command.exists(true)
		}

		// 指定用户发送
		if (!to.all && to.type === 'user') {
			const receiver = to.receiver.slice(0, 10)
			query._id = db.command.in(receiver)
		}

		// 指定用户标签
		if (to.type === 'userTags') {
			query.tags = db.command.in(to.receiver)
		}

		const {
			data: users
		} = await db.collection('uni-id-users').where(query).limit(count).get()
		console.log({
			users,
			query
		})
		if (users.length <= 0) {
			return {
				errCode: errCode('users-is-null'),
				errMsg: '请添加要发送的用户'
			}
		}

		const {
			data: templates
		} = await db.collection(this.tableNames.template).where({
			_id: templateId
		}).get()
		if (templates.length <= 0) {
			return {
				errCode: errCode('template-not-found'),
				errMsg: '模板不存在'
			}
		}
		const [template] = templates

		let docs = []
		for (const user of users) {
			const varData = buildTemplateData(templateData, user)
			const content = template.content.replace(/\$\{(.*?)\}/g, ($1, param) => varData[param] || $1)
			docs.push(`【${template.sign}】${content}`)
		}

		return {
			errCode: 0,
			errMsg: '',
			list: docs
		}
	}
}